Zynga interview questions

Startup - successful, good funding, stable, fun (has game room).

I was referred to one of the Zynga employees by a former colleague of mine. We talked on the phone for about an hour and I was invited for an in-person interview. The scheduling was somewhat strange as one recruiter called me on the phone and a different one sent me an e-mail with the instructions on how to get there and who I will meet. When I arrived it turned out that the instructions were somewhat wrong and I was at the wrong building. Thankfully the building where I was supposed to be was a two minute walk away so I managed to get there on time. I met with 3 engineers and one business person. The technical questions were quite easy (writing sample code, designing a service, etc) so I was surprised that I did not receive an offer. The thing that I did not like about the whole process was that they never even called or e-mailed to tell me that I was not a good fit for the position...